/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 11:07:13,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 11:07:13,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 11:07:13,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 11:07:13,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 11:07:13,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 11:07:13,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 11:07:13,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 11:07:13,473 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 11:07:13,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 11:07:13,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 11:07:13,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 11:07:13,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 11:07:13,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 11:07:13,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 11:07:13,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 11:07:13,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 11:07:13,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:07:13,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 11:07:13,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 11:07:13,477 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 11:07:13,477 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 11:07:13,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 11:07:13,477 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 11:07:13,477 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 11:07:13,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 11:07:13,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 11:07:13,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 11:07:13,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 11:07:13,675 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 11:07:13,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-03-19 11:07:13,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9163cd507/0395b0dddc644686b72f8c508ed4c43c/FLAG4f8febe02 [2022-03-19 11:07:14,089 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 11:07:14,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2022-03-19 11:07:14,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9163cd507/0395b0dddc644686b72f8c508ed4c43c/FLAG4f8febe02 [2022-03-19 11:07:14,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9163cd507/0395b0dddc644686b72f8c508ed4c43c [2022-03-19 11:07:14,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 11:07:14,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 11:07:14,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 11:07:14,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 11:07:14,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 11:07:14,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b5aa92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14, skipping insertion in model container [2022-03-19 11:07:14,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 11:07:14,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 11:07:14,259 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2022-03-19 11:07:14,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:07:14,273 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 11:07:14,280 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c[538,551] [2022-03-19 11:07:14,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 11:07:14,291 INFO L208 MainTranslator]: Completed translation [2022-03-19 11:07:14,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14 WrapperNode [2022-03-19 11:07:14,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 11:07:14,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 11:07:14,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 11:07:14,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 11:07:14,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 11:07:14,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 11:07:14,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 11:07:14,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 11:07:14,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (1/1) ... [2022-03-19 11:07:14,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 11:07:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:14,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 11:07:14,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 11:07:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 11:07:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 11:07:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 11:07:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 11:07:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 11:07:14,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 11:07:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 11:07:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 11:07:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 11:07:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 11:07:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 11:07:14,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 11:07:14,461 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 11:07:14,463 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 11:07:14,604 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 11:07:14,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 11:07:14,608 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 11:07:14,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:07:14 BoogieIcfgContainer [2022-03-19 11:07:14,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 11:07:14,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 11:07:14,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 11:07:14,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 11:07:14,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:07:14" (1/3) ... [2022-03-19 11:07:14,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd668b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:07:14, skipping insertion in model container [2022-03-19 11:07:14,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:07:14" (2/3) ... [2022-03-19 11:07:14,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd668b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:07:14, skipping insertion in model container [2022-03-19 11:07:14,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:07:14" (3/3) ... [2022-03-19 11:07:14,620 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2022-03-19 11:07:14,623 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 11:07:14,623 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 11:07:14,672 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 11:07:14,676 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 11:07:14,677 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 11:07:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 11:07:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 11:07:14,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:14,709 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:14,709 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:14,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-19 11:07:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:14,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034483077] [2022-03-19 11:07:14,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-19 11:07:14,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102744318] [2022-03-19 11:07:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:07:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:14,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:07:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:14,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:07:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:14,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:07:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:07:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102744318] [2022-03-19 11:07:14,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102744318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:14,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:14,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:07:14,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:14,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034483077] [2022-03-19 11:07:14,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034483077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:14,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:14,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 11:07:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567183075] [2022-03-19 11:07:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:14,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 11:07:14,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 11:07:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:07:14,941 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:07:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:15,023 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-19 11:07:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 11:07:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 11:07:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:15,034 INFO L225 Difference]: With dead ends: 69 [2022-03-19 11:07:15,034 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 11:07:15,037 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 11:07:15,042 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:15,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:07:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 11:07:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 11:07:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:07:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-19 11:07:15,075 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-19 11:07:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:15,075 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-19 11:07:15,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 11:07:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-19 11:07:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 11:07:15,077 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:15,078 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:15,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 11:07:15,078 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-19 11:07:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:15,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134357084] [2022-03-19 11:07:15,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-19 11:07:15,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:15,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607006778] [2022-03-19 11:07:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:15,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:07:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:07:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:07:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:07:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:07:15,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607006778] [2022-03-19 11:07:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607006778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:15,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:15,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:07:15,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:15,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134357084] [2022-03-19 11:07:15,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134357084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:15,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:07:15,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005627100] [2022-03-19 11:07:15,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:15,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:07:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:15,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:07:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:07:15,221 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 11:07:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:15,373 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 11:07:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 11:07:15,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 11:07:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:15,376 INFO L225 Difference]: With dead ends: 46 [2022-03-19 11:07:15,376 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 11:07:15,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:07:15,378 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:15,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:07:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 11:07:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 11:07:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:07:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-19 11:07:15,395 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-19 11:07:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:15,396 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-19 11:07:15,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 11:07:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-19 11:07:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 11:07:15,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:15,397 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:15,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 11:07:15,397 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:15,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-19 11:07:15,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:15,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189657501] [2022-03-19 11:07:15,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-19 11:07:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:15,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961101762] [2022-03-19 11:07:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 11:07:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 11:07:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 11:07:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 11:07:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 11:07:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 11:07:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 11:07:15,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961101762] [2022-03-19 11:07:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961101762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:15,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:15,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:07:15,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189657501] [2022-03-19 11:07:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189657501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:15,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:15,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:07:15,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373846704] [2022-03-19 11:07:15,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:15,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:07:15,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:07:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:07:15,469 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 11:07:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:15,587 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-19 11:07:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 11:07:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 11:07:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:15,588 INFO L225 Difference]: With dead ends: 50 [2022-03-19 11:07:15,588 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 11:07:15,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:07:15,589 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:15,589 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:07:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 11:07:15,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-19 11:07:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 11:07:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 11:07:15,595 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-19 11:07:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:15,596 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 11:07:15,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 11:07:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 11:07:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 11:07:15,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:15,597 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:15,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 11:07:15,597 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-19 11:07:15,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:15,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480063047] [2022-03-19 11:07:15,598 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:15,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-19 11:07:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:15,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527206829] [2022-03-19 11:07:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:15,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:15,605 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:15,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246540361] [2022-03-19 11:07:15,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:07:15,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:15,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:15,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 11:07:15,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:07:15,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:15,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:07:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 11:07:15,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:07:15,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527206829] [2022-03-19 11:07:15,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246540361] [2022-03-19 11:07:15,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246540361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:15,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:15,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:07:15,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480063047] [2022-03-19 11:07:15,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480063047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:15,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:15,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:07:15,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506511503] [2022-03-19 11:07:15,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:15,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:07:15,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:07:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:07:15,741 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 11:07:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:15,784 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-19 11:07:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:07:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 11:07:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:15,786 INFO L225 Difference]: With dead ends: 69 [2022-03-19 11:07:15,786 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 11:07:15,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:07:15,787 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:15,787 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:07:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 11:07:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 11:07:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 11:07:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-19 11:07:15,797 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-19 11:07:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:15,797 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-19 11:07:15,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 11:07:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-19 11:07:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 11:07:15,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:15,798 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:15,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 11:07:16,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:16,020 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:16,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:16,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-19 11:07:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:16,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088344837] [2022-03-19 11:07:16,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:16,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-19 11:07:16,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:16,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196002123] [2022-03-19 11:07:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:16,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:16,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:16,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009953460] [2022-03-19 11:07:16,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:07:16,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:16,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:16,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 11:07:16,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:07:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 11:07:16,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 11:07:16,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:07:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 11:07:16,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196002123] [2022-03-19 11:07:16,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:16,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009953460] [2022-03-19 11:07:16,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009953460] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:07:16,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:07:16,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 11:07:16,425 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:16,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088344837] [2022-03-19 11:07:16,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088344837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:16,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:16,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:07:16,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940266025] [2022-03-19 11:07:16,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:16,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:07:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:16,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:07:16,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 11:07:16,427 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:07:16,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:16,468 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-19 11:07:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:07:16,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-19 11:07:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:16,469 INFO L225 Difference]: With dead ends: 68 [2022-03-19 11:07:16,469 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 11:07:16,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 11:07:16,470 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:16,470 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:07:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 11:07:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 11:07:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 11:07:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-19 11:07:16,480 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-19 11:07:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:16,481 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-19 11:07:16,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:07:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-19 11:07:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 11:07:16,481 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:16,481 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:16,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 11:07:16,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:16,698 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-19 11:07:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:16,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229916005] [2022-03-19 11:07:16,699 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-19 11:07:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:16,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194318076] [2022-03-19 11:07:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:16,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:16,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598067663] [2022-03-19 11:07:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:07:16,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:16,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:16,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 11:07:16,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:07:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 11:07:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 11:07:16,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:07:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 11:07:17,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:17,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194318076] [2022-03-19 11:07:17,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:17,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598067663] [2022-03-19 11:07:17,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598067663] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 11:07:17,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:07:17,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 11:07:17,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:17,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229916005] [2022-03-19 11:07:17,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229916005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:17,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:17,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:07:17,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466388886] [2022-03-19 11:07:17,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:17,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:07:17,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:17,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:07:17,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 11:07:17,044 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:07:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:17,081 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-19 11:07:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:07:17,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-19 11:07:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:17,082 INFO L225 Difference]: With dead ends: 76 [2022-03-19 11:07:17,082 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 11:07:17,082 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 11:07:17,083 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:17,083 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:07:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 11:07:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-19 11:07:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 11:07:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-19 11:07:17,092 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-19 11:07:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:17,093 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-19 11:07:17,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 11:07:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-19 11:07:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 11:07:17,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:17,093 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:17,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 11:07:17,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:17,314 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-19 11:07:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [911883126] [2022-03-19 11:07:17,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-19 11:07:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:17,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265174009] [2022-03-19 11:07:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:17,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:17,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270436633] [2022-03-19 11:07:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:07:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:17,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:17,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 11:07:17,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:07:17,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 11:07:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 11:07:17,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 11:07:17,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265174009] [2022-03-19 11:07:17,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270436633] [2022-03-19 11:07:17,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270436633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:17,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:17,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:07:17,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [911883126] [2022-03-19 11:07:17,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [911883126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:17,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:17,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 11:07:17,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300148365] [2022-03-19 11:07:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:17,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 11:07:17,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:17,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 11:07:17,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 11:07:17,477 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 11:07:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:17,517 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-19 11:07:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 11:07:17,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-19 11:07:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:17,522 INFO L225 Difference]: With dead ends: 79 [2022-03-19 11:07:17,522 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 11:07:17,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:07:17,523 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:17,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 11:07:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 11:07:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-19 11:07:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 11:07:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-19 11:07:17,538 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-19 11:07:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:17,539 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-19 11:07:17,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 11:07:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-19 11:07:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 11:07:17,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:17,543 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:17,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 11:07:17,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:17,756 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-19 11:07:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:17,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790865125] [2022-03-19 11:07:17,757 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-19 11:07:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:17,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641272548] [2022-03-19 11:07:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:17,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254332034] [2022-03-19 11:07:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:07:17,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:17,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:17,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 11:07:17,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:07:17,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 11:07:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 11:07:18,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:07:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 11:07:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641272548] [2022-03-19 11:07:19,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254332034] [2022-03-19 11:07:19,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254332034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:07:19,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:07:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 11:07:19,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:19,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790865125] [2022-03-19 11:07:19,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790865125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:19,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 11:07:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551855954] [2022-03-19 11:07:19,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:19,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 11:07:19,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 11:07:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 11:07:19,363 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:07:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:19,494 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-19 11:07:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 11:07:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-19 11:07:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:19,496 INFO L225 Difference]: With dead ends: 135 [2022-03-19 11:07:19,496 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 11:07:19,497 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 11:07:19,497 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:19,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:07:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 11:07:19,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-19 11:07:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 11:07:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-19 11:07:19,508 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-19 11:07:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:19,508 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-19 11:07:19,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:07:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-19 11:07:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 11:07:19,509 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:19,509 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:19,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 11:07:19,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:19,727 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:19,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-19 11:07:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:19,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721003411] [2022-03-19 11:07:19,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-19 11:07:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:19,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991814464] [2022-03-19 11:07:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:19,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:19,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:19,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747207115] [2022-03-19 11:07:19,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:07:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:19,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:19,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 11:07:19,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:07:19,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 11:07:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 11:07:20,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:07:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 11:07:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:21,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991814464] [2022-03-19 11:07:21,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747207115] [2022-03-19 11:07:21,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747207115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:07:21,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:07:21,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-19 11:07:21,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:21,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721003411] [2022-03-19 11:07:21,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721003411] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:21,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:21,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 11:07:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094619054] [2022-03-19 11:07:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:21,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 11:07:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 11:07:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 11:07:21,513 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 11:07:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:21,620 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-19 11:07:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 11:07:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-19 11:07:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:21,621 INFO L225 Difference]: With dead ends: 133 [2022-03-19 11:07:21,621 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 11:07:21,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-19 11:07:21,622 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:21,622 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:07:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 11:07:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 11:07:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 11:07:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-19 11:07:21,632 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-19 11:07:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:21,633 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-19 11:07:21,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 11:07:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-19 11:07:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 11:07:21,633 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:21,633 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:21,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 11:07:21,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:21,850 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-19 11:07:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:21,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180211623] [2022-03-19 11:07:21,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-19 11:07:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124648562] [2022-03-19 11:07:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:21,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:21,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:21,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597650607] [2022-03-19 11:07:21,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:07:21,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:21,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:21,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 11:07:21,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:07:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 11:07:21,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 11:07:23,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:07:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 11:07:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:07:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124648562] [2022-03-19 11:07:38,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:07:38,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597650607] [2022-03-19 11:07:38,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597650607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:07:38,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:07:38,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-19 11:07:38,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:07:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180211623] [2022-03-19 11:07:38,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180211623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:07:38,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:07:38,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 11:07:38,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134994156] [2022-03-19 11:07:38,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:07:38,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 11:07:38,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:38,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 11:07:38,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-19 11:07:38,363 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 11:07:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:07:39,525 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-19 11:07:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 11:07:39,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-19 11:07:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:07:39,526 INFO L225 Difference]: With dead ends: 116 [2022-03-19 11:07:39,526 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 11:07:39,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-19 11:07:39,527 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 11:07:39,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 11:07:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 11:07:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 11:07:39,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 11:07:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-19 11:07:39,535 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-19 11:07:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:07:39,535 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-19 11:07:39,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 11:07:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-19 11:07:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 11:07:39,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:07:39,536 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:07:39,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 11:07:39,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:39,756 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:07:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:07:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-19 11:07:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:07:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730045811] [2022-03-19 11:07:39,757 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:07:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-19 11:07:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:07:39,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476520736] [2022-03-19 11:07:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:07:39,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:07:39,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:07:39,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046600481] [2022-03-19 11:07:39,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:07:39,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:07:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:07:39,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:07:39,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 11:07:39,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 11:07:39,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:07:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 11:07:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:07:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 11:07:54,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:08:43,442 WARN L232 SmtUtils]: Spent 30.17s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:09:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 11:09:55,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:09:55,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476520736] [2022-03-19 11:09:55,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:09:55,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046600481] [2022-03-19 11:09:55,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046600481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:09:55,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:09:55,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-19 11:09:55,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:09:55,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730045811] [2022-03-19 11:09:55,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730045811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:09:55,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:09:55,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 11:09:55,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561193780] [2022-03-19 11:09:55,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:09:55,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 11:09:55,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 11:09:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-19 11:09:55,169 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:09:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:09:55,710 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-19 11:09:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 11:09:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-19 11:09:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:09:55,711 INFO L225 Difference]: With dead ends: 112 [2022-03-19 11:09:55,711 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 11:09:55,712 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-19 11:09:55,712 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 11:09:55,712 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 257 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 11:09:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 11:09:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-19 11:09:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 11:09:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-19 11:09:55,723 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-19 11:09:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:09:55,724 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-19 11:09:55,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 11:09:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-19 11:09:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 11:09:55,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:09:55,724 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:09:55,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 11:09:55,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 11:09:55,928 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:09:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:09:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-19 11:09:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:55,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768658478] [2022-03-19 11:09:55,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:09:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-19 11:09:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:09:55,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998328146] [2022-03-19 11:09:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:09:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:09:55,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:09:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221880611] [2022-03-19 11:09:55,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:09:55,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:09:55,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:09:55,937 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:09:55,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 11:09:56,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:09:56,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:09:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 11:09:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:09:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 11:09:56,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:09:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 11:09:58,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:09:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998328146] [2022-03-19 11:09:58,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:09:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221880611] [2022-03-19 11:09:58,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221880611] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:09:58,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:09:58,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 11:09:58,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:09:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768658478] [2022-03-19 11:09:58,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768658478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:09:58,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:09:58,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 11:09:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194064190] [2022-03-19 11:09:58,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:09:58,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 11:09:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:58,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 11:09:58,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-19 11:09:58,692 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 11:09:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:09:59,005 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-19 11:09:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 11:09:59,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-19 11:09:59,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:09:59,007 INFO L225 Difference]: With dead ends: 177 [2022-03-19 11:09:59,007 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 11:09:59,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-19 11:09:59,008 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:09:59,008 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:09:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 11:09:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-19 11:09:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 11:09:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-19 11:09:59,020 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-19 11:09:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:09:59,020 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-19 11:09:59,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 11:09:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-19 11:09:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 11:09:59,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:09:59,021 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:09:59,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 11:09:59,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:09:59,235 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:09:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:09:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-19 11:09:59,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:09:59,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1883053669] [2022-03-19 11:09:59,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:09:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-19 11:09:59,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:09:59,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61100062] [2022-03-19 11:09:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:09:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:09:59,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:09:59,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727579648] [2022-03-19 11:09:59,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:09:59,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:09:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:09:59,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:09:59,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 11:09:59,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:09:59,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:09:59,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 11:09:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 11:10:00,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 11:10:51,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:10:51,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61100062] [2022-03-19 11:10:51,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:10:51,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727579648] [2022-03-19 11:10:51,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727579648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:10:51,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:10:51,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 11:10:51,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:10:51,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1883053669] [2022-03-19 11:10:51,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1883053669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:10:51,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:10:51,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 11:10:51,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861994514] [2022-03-19 11:10:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:10:51,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 11:10:51,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 11:10:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-19 11:10:51,138 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 11:10:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:10:52,716 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-19 11:10:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 11:10:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-19 11:10:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:10:52,717 INFO L225 Difference]: With dead ends: 184 [2022-03-19 11:10:52,717 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 11:10:52,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-19 11:10:52,718 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 11:10:52,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 511 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 11:10:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 11:10:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 11:10:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 11:10:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-03-19 11:10:52,733 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 105 [2022-03-19 11:10:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:10:52,733 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-03-19 11:10:52,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 11:10:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-03-19 11:10:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 11:10:52,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:10:52,734 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:10:52,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 11:10:52,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 11:10:52,951 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:10:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:10:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-19 11:10:52,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:52,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235229567] [2022-03-19 11:10:52,952 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:10:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-19 11:10:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:10:52,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525631726] [2022-03-19 11:10:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:10:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:10:52,957 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:10:52,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581060337] [2022-03-19 11:10:52,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:10:52,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:10:52,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:10:52,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:10:52,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 11:10:53,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 11:10:53,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:10:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 11:10:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-19 11:10:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:53,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:10:53,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525631726] [2022-03-19 11:10:53,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:10:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581060337] [2022-03-19 11:10:53,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581060337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 11:10:53,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:10:53,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 11:10:53,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:10:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235229567] [2022-03-19 11:10:53,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235229567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:10:53,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:10:53,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 11:10:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940310400] [2022-03-19 11:10:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:10:53,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 11:10:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 11:10:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-19 11:10:53,789 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 11:10:54,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:10:54,155 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-03-19 11:10:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 11:10:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-19 11:10:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:10:54,157 INFO L225 Difference]: With dead ends: 168 [2022-03-19 11:10:54,157 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 11:10:54,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 11:10:54,157 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 11:10:54,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-03-19 11:10:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 11:10:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-19 11:10:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 100 states have internal predecessors, (103), 38 states have call successors, (38), 22 states have call predecessors, (38), 21 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 11:10:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-03-19 11:10:54,174 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 114 [2022-03-19 11:10:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:10:54,175 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-03-19 11:10:54,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 11:10:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-03-19 11:10:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 11:10:54,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:10:54,176 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:10:54,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 11:10:54,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 11:10:54,393 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:10:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:10:54,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-19 11:10:54,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:10:54,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524449433] [2022-03-19 11:10:54,393 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:10:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-19 11:10:54,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:10:54,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485667726] [2022-03-19 11:10:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:10:54,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:10:54,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:10:54,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095164307] [2022-03-19 11:10:54,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:10:54,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:10:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:10:54,408 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:10:54,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 11:10:54,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:10:54,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:10:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 11:10:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:10:55,178 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 11:10:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-03-19 11:10:55,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:10:55,362 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 11:11:05,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:11:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485667726] [2022-03-19 11:11:05,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:11:05,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095164307] [2022-03-19 11:11:05,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095164307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 11:11:05,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:11:05,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 11:11:05,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:11:05,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524449433] [2022-03-19 11:11:05,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524449433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:11:05,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:11:05,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 11:11:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930737440] [2022-03-19 11:11:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:11:05,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 11:11:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 11:11:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-19 11:11:05,588 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 11:11:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:11:06,667 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-03-19 11:11:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 11:11:06,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2022-03-19 11:11:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:11:06,668 INFO L225 Difference]: With dead ends: 161 [2022-03-19 11:11:06,668 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 11:11:06,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-19 11:11:06,671 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 11:11:06,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 438 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 11:11:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 11:11:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-19 11:11:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 79 states have internal predecessors, (82), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 11:11:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-03-19 11:11:06,681 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 116 [2022-03-19 11:11:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:11:06,681 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-03-19 11:11:06,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 11:11:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-03-19 11:11:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 11:11:06,682 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:11:06,682 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:11:06,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 11:11:06,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 11:11:06,883 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:11:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:11:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 5 times [2022-03-19 11:11:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:06,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541428900] [2022-03-19 11:11:06,883 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:11:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 6 times [2022-03-19 11:11:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:11:06,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47373782] [2022-03-19 11:11:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:11:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:11:06,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:11:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714337998] [2022-03-19 11:11:06,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:11:06,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:11:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:11:06,900 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:11:06,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 11:11:06,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 11:11:06,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:11:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 11:11:06,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:11:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 11:11:07,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:11:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-19 11:11:07,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:11:07,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47373782] [2022-03-19 11:11:07,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:11:07,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714337998] [2022-03-19 11:11:07,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714337998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:11:07,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:11:07,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-19 11:11:07,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:11:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541428900] [2022-03-19 11:11:07,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541428900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:11:07,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:11:07,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 11:11:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988307193] [2022-03-19 11:11:07,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:11:07,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 11:11:07,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 11:11:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:11:07,489 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 11:11:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:11:07,570 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-03-19 11:11:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 11:11:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 120 [2022-03-19 11:11:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:11:07,571 INFO L225 Difference]: With dead ends: 150 [2022-03-19 11:11:07,571 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 11:11:07,572 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 11:11:07,572 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 11:11:07,572 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 11:11:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 11:11:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 11:11:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.108433734939759) internal successors, (92), 87 states have internal predecessors, (92), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 11:11:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-03-19 11:11:07,584 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 120 [2022-03-19 11:11:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:11:07,584 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-03-19 11:11:07,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 11:11:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-03-19 11:11:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 11:11:07,585 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:11:07,585 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:11:07,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 11:11:07,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 11:11:07,787 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:11:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:11:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-19 11:11:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:11:07,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907187536] [2022-03-19 11:11:07,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:11:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-19 11:11:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:11:07,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556890870] [2022-03-19 11:11:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:11:07,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:11:07,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:11:07,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442619982] [2022-03-19 11:11:07,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:11:07,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:11:07,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:11:07,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:11:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 11:11:07,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:11:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:11:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 11:11:07,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:11:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 11:11:08,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:11:40,468 WARN L232 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:12:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 11:12:08,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:12:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556890870] [2022-03-19 11:12:08,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:12:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442619982] [2022-03-19 11:12:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442619982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:12:08,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:12:08,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-03-19 11:12:08,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:12:08,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907187536] [2022-03-19 11:12:08,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907187536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:12:08,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:12:08,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 11:12:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263933993] [2022-03-19 11:12:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:12:08,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 11:12:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:12:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 11:12:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-19 11:12:08,914 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 11:12:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:12:09,466 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2022-03-19 11:12:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 11:12:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2022-03-19 11:12:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:12:09,467 INFO L225 Difference]: With dead ends: 241 [2022-03-19 11:12:09,467 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 11:12:09,468 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-03-19 11:12:09,468 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 11:12:09,469 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 629 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 11:12:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 11:12:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-03-19 11:12:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 123 states have internal predecessors, (131), 49 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 11:12:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-03-19 11:12:09,492 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 122 [2022-03-19 11:12:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:12:09,492 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-03-19 11:12:09,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 11:12:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-03-19 11:12:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 11:12:09,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:12:09,494 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:12:09,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 11:12:09,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:12:09,707 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:12:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:12:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 15 times [2022-03-19 11:12:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:12:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1659497646] [2022-03-19 11:12:09,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:12:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 16 times [2022-03-19 11:12:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:12:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74220416] [2022-03-19 11:12:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:12:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:12:09,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:12:09,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616466430] [2022-03-19 11:12:09,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 11:12:09,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:12:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:12:09,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:12:09,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 11:12:09,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 11:12:09,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:12:09,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 11:12:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:12:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-19 11:12:10,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:12:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-19 11:12:27,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:12:27,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74220416] [2022-03-19 11:12:27,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:12:27,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616466430] [2022-03-19 11:12:27,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616466430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:12:27,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:12:27,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-03-19 11:12:27,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:12:27,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1659497646] [2022-03-19 11:12:27,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1659497646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:12:27,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:12:27,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 11:12:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790710559] [2022-03-19 11:12:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:12:27,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 11:12:27,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:12:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 11:12:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-19 11:12:27,382 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 11:12:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:12:27,741 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-03-19 11:12:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 11:12:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 127 [2022-03-19 11:12:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:12:27,743 INFO L225 Difference]: With dead ends: 238 [2022-03-19 11:12:27,743 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 11:12:27,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-03-19 11:12:27,744 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 11:12:27,744 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 629 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 11:12:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 11:12:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-03-19 11:12:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1015625) internal successors, (141), 135 states have internal predecessors, (141), 52 states have call successors, (52), 27 states have call predecessors, (52), 26 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 11:12:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-03-19 11:12:27,761 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 127 [2022-03-19 11:12:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:12:27,761 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-03-19 11:12:27,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 11:12:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-03-19 11:12:27,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 11:12:27,762 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:12:27,762 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:12:27,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 11:12:27,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 11:12:27,978 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:12:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:12:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 17 times [2022-03-19 11:12:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:12:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004976270] [2022-03-19 11:12:27,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:12:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 18 times [2022-03-19 11:12:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:12:27,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733553558] [2022-03-19 11:12:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:12:27,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:12:27,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:12:27,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786630944] [2022-03-19 11:12:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 11:12:27,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:12:27,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:12:27,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:12:27,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 11:12:28,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 11:12:28,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:12:28,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 11:12:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:12:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 171 proven. 57 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2022-03-19 11:12:29,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:12:57,098 WARN L232 SmtUtils]: Spent 14.66s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:16:05,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:16:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733553558] [2022-03-19 11:16:05,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:16:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786630944] [2022-03-19 11:16:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786630944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 11:16:05,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 11:16:05,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 11:16:05,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:16:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004976270] [2022-03-19 11:16:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004976270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:16:05,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:16:05,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 11:16:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811597849] [2022-03-19 11:16:05,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:16:05,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 11:16:05,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:16:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 11:16:05,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-03-19 11:16:05,847 INFO L87 Difference]: Start difference. First operand 207 states and 242 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 11:16:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:16:07,520 INFO L93 Difference]: Finished difference Result 225 states and 261 transitions. [2022-03-19 11:16:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 11:16:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-03-19 11:16:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:16:07,522 INFO L225 Difference]: With dead ends: 225 [2022-03-19 11:16:07,522 INFO L226 Difference]: Without dead ends: 218 [2022-03-19 11:16:07,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-03-19 11:16:07,523 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 11:16:07,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 533 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 11:16:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-19 11:16:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2022-03-19 11:16:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 141 states have internal predecessors, (146), 52 states have call successors, (52), 29 states have call predecessors, (52), 28 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 11:16:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 247 transitions. [2022-03-19 11:16:07,553 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 247 transitions. Word has length 135 [2022-03-19 11:16:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:16:07,554 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 247 transitions. [2022-03-19 11:16:07,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 11:16:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 247 transitions. [2022-03-19 11:16:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 11:16:07,555 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:16:07,555 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:16:07,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 11:16:07,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:16:07,770 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:16:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:16:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1932789221, now seen corresponding path program 1 times [2022-03-19 11:16:07,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:16:07,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185792409] [2022-03-19 11:16:07,771 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:16:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1932789221, now seen corresponding path program 2 times [2022-03-19 11:16:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:16:07,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417263782] [2022-03-19 11:16:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:16:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:16:07,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:16:07,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293253954] [2022-03-19 11:16:07,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:16:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:16:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:16:07,779 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:16:07,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 11:16:07,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:16:07,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:16:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 11:16:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:16:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-19 11:16:08,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 11:17:00,256 WARN L232 SmtUtils]: Spent 11.43s on a formula simplification that was a NOOP. DAG size: 432 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:18:51,658 WARN L232 SmtUtils]: Spent 32.45s on a formula simplification that was a NOOP. DAG size: 434 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 11:21:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-19 11:21:17,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 11:21:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417263782] [2022-03-19 11:21:17,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 11:21:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293253954] [2022-03-19 11:21:17,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293253954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 11:21:17,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 11:21:17,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-03-19 11:21:17,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 11:21:17,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185792409] [2022-03-19 11:21:17,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185792409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 11:21:17,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 11:21:17,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 11:21:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052314471] [2022-03-19 11:21:17,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 11:21:17,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 11:21:17,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 11:21:17,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 11:21:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-19 11:21:17,536 INFO L87 Difference]: Start difference. First operand 215 states and 247 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 11:21:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 11:21:18,237 INFO L93 Difference]: Finished difference Result 235 states and 266 transitions. [2022-03-19 11:21:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 11:21:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-03-19 11:21:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 11:21:18,239 INFO L225 Difference]: With dead ends: 235 [2022-03-19 11:21:18,239 INFO L226 Difference]: Without dead ends: 220 [2022-03-19 11:21:18,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-03-19 11:21:18,239 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 11 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 11:21:18,239 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 682 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 11:21:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-19 11:21:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 204. [2022-03-19 11:21:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 133 states have internal predecessors, (138), 49 states have call successors, (49), 28 states have call predecessors, (49), 27 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 11:21:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2022-03-19 11:21:18,263 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 135 [2022-03-19 11:21:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 11:21:18,263 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2022-03-19 11:21:18,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 11:21:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2022-03-19 11:21:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 11:21:18,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 11:21:18,264 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 11:21:18,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 11:21:18,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:21:18,492 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 11:21:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 11:21:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1737369023, now seen corresponding path program 19 times [2022-03-19 11:21:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 11:21:18,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506014943] [2022-03-19 11:21:18,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 11:21:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1737369023, now seen corresponding path program 20 times [2022-03-19 11:21:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 11:21:18,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017041952] [2022-03-19 11:21:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 11:21:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 11:21:18,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 11:21:18,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709631360] [2022-03-19 11:21:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 11:21:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 11:21:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 11:21:18,502 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 11:21:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 11:21:18,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 11:21:18,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 11:21:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 11:21:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 11:21:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 85 proven. 66 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-03-19 11:21:19,505 INFO L328 TraceCheckSpWp]: Computing backward predicates...